Bruno2
New member
I have been running my fuel psi at 52 . With my mods is this enough or not?
Every truck, every injector is different...
With stock injectors I ran 70 psi, with stage 1-2's I ran 72psi... With the hybrids they seem happiest around 62 psi.
yeah, we have built a few sets (2400).
I think we have a general understanding at least
Does anybody actually know how the fuel injectors actually work on this thing? If you put too much pressure, you can actually force fuel under intensifier piston and slow the injector. You just need to keep the injectors filled and nothing more. I recommend somewhere between 55 and 62.
Fuel pressure is more important to the life of the nozzle than to power loss. Think about how hard that nozzle needle hits it's seat. When fuel pressure is down there is less cushion. This can cause nozzles to lose flow over time, and in the case of larger nozzles (200%, 400%, & 600%) to crack/break. We have tested fuel pressures from 50psi-90psi and found that 65-75psi is optimum. After 75psi is there is no positive gain. The OBS trucks seem to do fine with 160-170cc injectors or less with the mechanical pump and lower pressures. However any split shot truck or truck running hybrids should try to keep the fuel pressure > 60psi. This is our policy when it comes to injector warranty.
So what pressure would you recommend for a set of OBS Swamps Babies with electric fuel (single SD pump)? I think mine is set for like 64.
^that pressure will be just fine.